Randomdata Hackerspace Utrecht

Hi Everyone,

This is our weekly open hackerspace evening! Usually from 19:00 :-)

Feel free to drop by, come and nerd with us!

See this Tuesday!

We're in room 126, ring the room number and we'll open the door. We're located on the first floor

Randomdata hosted a SPAM Analysis Workshop diving deep into the mechanics of unsolicited email. Participants examined real-world datasets, dissected message headers and payloads, and explored techniques for detecting obfuscation and malicious attachments. The workshop emphasized practical skills in digital forensics, spam filtering, and threat intelligence, giving attendees the tools to better understand and counter evolving email-based attacks.

This session is FREE for Randomdata members, external friends are welcome for 10€ but will receive 1 drink for free.

We share notes/details/etc during the workhop thru our wiki: https://wiki.randomdata.nl/wiki/Workshops#CYBERSESSIONS_2025

### Who will come?

• Security enthusiasts & hackers curious about how spammers operate.
• System security administrators who manage mail servers and want to understand spam filtering.
• Students & researchers interested in digital forensics, threat intelligence, or cybersecurity basics.
• Tech hobbyists who enjoy digging into real-world data and exploring how malicious actors try to bypass defenses.

### Skills needed

• Basic computer literacy (comfortable using the command line and handling files).
• Some familiarity with email systems (knowing what headers, attachments, or filters are is helpful but not required).
• Curiosity and analytical thinking, the workshop is hands-on, so participants should enjoy experimenting, spotting patterns, and asking “why.”
• Optional advanced skills (like Python scripting, regex, or forensic tools) can give deeper insights, but beginners will still be able to follow along.

Every other Saturday we are holding a book club where we get together to discuss and work through classic CompSci texts. The pressure is intentionally held low and the feeling casual, because everyone has enough to worry about as is.

If you miss a day or couldn't finish something in time, no worries, you will be brought up to speed first. We start at 14:00 and go on to roughly 6-ish, a little later if there is food involved. All skill levels are welcome, but some basic programming knowledge is advised. If the whole book seems too daunting, you are free to pop by anyway to see if taking on the task with a supportive group makes a difference. Just saying hi is also fine, we're a pretty chill bunch. Non-members are expected to donate a little to help keep the lights on, but if money is tight don't worry about it. A tenner for the length of the book is more than enough.

We are currently doing chapter 1 of the classic K&R C book (2nd edition) and comparing the practices of that time with contemporary C (C23). Our focus will be on security mostly. We will be using Modern C by Jens Gustedt as our source for up-to-date habits and methods [https://gustedt.gitlabpages.inria.fr/modern-c/].

Hi Everyone,

This is our weekly open hackerspace evening! Usually from 19:00 :-)

Feel free to drop by, come and nerd with us!

See this Tuesday!

We're in room 126, ring the room number and we'll open the door. We're located on the first floor